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GW230825_041334 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230825_041334

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230825_041334

Both component-mass lower bounds exceed 3 solar masses

Primary mass44 M☉

Secondary mass27.2 M☉

ObservedAug 25, 2023

Event identity

Classification and release

ID: gwtc:GW230825_041334
Event name: GW230825_041334
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-4.1
Preferred event version: v2
Observed at: Friday, August 25, 2023 at 4:13:34 AM UTC UTC
GPS time: 1,376,972,032.5

Source-frame posterior

Component and remnant masses

Primary mass: 44 (-12, +17) M☉
Secondary mass: 27.2 (-8.8, +12) M☉
Remnant mass: 67 (-15, +21) M☉
Effective spin: 0.29
Network SNR: 8.8

Propagation

Distance and statistical context

Luminosity distance: 4,900 (-2,900, +4,200) Mpc
Redshift: 0.76
Astrophysical probability: 0.99
False-alarm rate: 0.093

Provenance

Official source record

GWOSC · GWTC-4.1

GW230825_041334

Last synchronized 9/12/2026, 3:20:17 AM UTC.

JSON record GWOSC event page